Benzid, Youcef, Imad Chermat, and Saida Khouatra. “An Empirical Analysis of Cost Efficiency in GCC Banking Sector: A Comparative Study Between Islamic & Conventional Banks”. Copernican Journal of Finance & Accounting 15, no. 2 (September 21, 2026): 29–48. Accessed October 8, 2026. https://apcz.umk.pl/CJFA/article/view/73330.